Simple Longitudinal Multi-Start Thread G351 - 4110 - HEIDENHAIN CNC PILOT 640 User Manual

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Simple longitudinal multi-start thread G351 – 4110
G351 machines a single or multi-start longitudinal thread (internal or
external thread) with variable pitch. The thread starts at the current
tool position and ends at the Final point Z.
Parameters:
Z: Edge of thread
F: Thread pitch
U: Thread depth
U > 0: Internal thread
U <= 0: External thread (lateral surface or front face)
U = +999 or –999: Thread depth is calculated
I: Max. approach (no input: I is calculated from the thread pitch
and the thread depth)
A: Approach ang. (range: –60° < A < 60°; default: 30°)
A < 0: Infeed on left thread flank
A > 0: Infeed on right thread flank
D: No.gears (default: 1 single-start thread)
J: Rem. cut depth (default: 1/100 mm)
E: Variable gr. (default: 0)
Increases/decreases the pitch per revolution by E.
Internal or external threads: See algebraic sign of U
Number of cutting passes: I is used for the first pass. The cutting
depth is reduced with each further pass until the remaining cutting
depth J is reached.
Handwheel superposition (provided that your machine is equipped
accordingly): The superposition is limited to the following range:
X direction: Depending on the current cutting depth—without
exceeding the starting and end points of the thread
Z direction: Maximal 1 thread groove—without exceeding the
starting and end points of the thread
NC stop becomes effective at the end of a thread cut.
The feed rate and spindle speed overrides are not
effective during cycle run.
Handwheel superimpositioning can be activated with a
switch located on the machine operating panel if your
machine is equipped accordingly.
Feedforward control is switched off.
506
DIN/ISO programming | G codes from previous controls
HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017